Metro

District of Columbia fire and emergency workers at the site of a rush-hour collision between two Metro transit trains in northeast Washington, D.C. on Monday.

District of Columbia fire and emergency workers at the site of a rush-hour collision between two Metro transit trains in northeast Washington, D.C. on Monday. (Pablo Martinez Monsivais / Associated Press)

District of Columbia fire and emergency workers at the site of a rush-hour collision between two Metro transit trains in northeast Washington, D.C. on Monday.